I can review this as someone who knew several of the characters portrayed in this film, including Hannah Arendt and my parents, Hans and Eleonore Jonas. Suffice it to say that seeing my family and friends of the family up on a screen in a movie theater was one of the most bizarre experiences of my life.
I thought the film was outstanding, and the irony of German actors playing Jewish intellectual refugees of the Holocaust was not lost upon me. I thought the actors playing my parents channeled them almost to perfection. The actress playing Hannah Arendt, though terrific, portrayed her as someone softer and less intense than the political scientist was in real life. Be that as it may, it's a profound and well-executed film about seminal intellectuals' experience of and response to the horrific evil of their time, and as such, is definitely worth watching, more than once.